
footer .backtotop {
  position: fixed;
  width: 60px;
  height: 60px;
  bottom: 120px;
  right: 50px;
  background: rgba(28, 31, 33, 0.5);
  border-radius: 2px;
  color: white;
  line-height: 60px;
  text-align: center;
  font-size: 30px;
}